VAMOS A MATAR COMPANEROS (aka COMPANEROS) is a 1970 western movie co-produced by Atlantida Films s.a. (Madrid), Terra Filmkunst (Berlino), Tritone Filmindustria (Roma), directed by Sergio Corbucci and starring Franco Nero, Tomas Milian, Jack Palance, Fernando Rey, Iris Berben, José Bodalo, Eduardo Fajardo, Karin Schubert, Gerard Tichy, Gino Pernice, Claudio Scarchilli, Alvaro de Luna, Jesus Fernandez. This film along with TEPEPA , IL MERCENARIO and LA RESA DEI CONTI is part of the revolutionary Western genre. Ennio Morricone wrote a main theme for orchestra and choir ( the Cantori Moderni di Alessandroni ) who becomes a real battle hymn of the protagonists. The motifs is alternated with suspense and melancholic . Another protagonist of this wonderful OST is the late Franco De Gemini with his harmonica who was able to create thrilling passages that evoke all the epic side of the story